var express = require('express');
var router = express.Router();
var Category = require('../models/Category');
var Content = require('../models/Content');
var data;
/*
* 处理通用的数据
* */
router.use(function (req, res, next) {
    data = {
        userInfo: req.userInfo,
        categories: []
    }
    Category.find().then(function (categories) {
        data.categories= categories;
        next();
    })

});

/**
 * 首页
 */
router.get('/',function (req, res, next) {
    data.category = req.category||'';
    data.count=0;
    data.page = Number(req.query.page||1);
    data.limit = 10;
    data.pages =0;
    var where ={};
    if (data.category){
        where.category = data.category
    }
    Content.where(where).count().then(function (count) {
        data.count = count;
        // 上舍入计算总页数
        data.pages = Math.ceil(data.count/data.limit);
        // 取值不能超过pages
        data.page = Math.min(data.page,data.pages);
        // 取值不能小于1
        data.page = Math.max(data.page,1);
        var skip = (data.page-1)*data.limit;
        return Content.where(where).find().limit(data.limit).skip(skip).populate(['category','user']).sort({
            addTime:-1
        });
    }).then(function (contents) {
        data.contents = contents;
        res.render('main/index',data);
    })


});
module.exports = router;